The DXVA Checker will check to see which codecs you have on your computer. This becomes important only when you want to run the latest HEVC standard on your computer. This software DXVA Checker which be able to do this for you. The HEVC is used today for VLC, mpv, MPC-BE, PotPlayer or Kodi and Real Alternative. You will also see the HEVC Video Extension standard for video as well as for pictures.